Per Enqvist

Selected Publications



Theses

P. Enqvist, Spectral Estimation by Geometric, Topological and Optimization Methods, Ph.D. thesis, Royal Institute of Technology, Stockholm, Sweden, 2001.

P. Enqvist, Control Theory and Splines: Applied to Signature Storage, TRITA-MAT. 1994:13, Master thesis, Royal Institute of Technology, Stockholm, Sweden, 1994.

Articles in Journals

P. Enqvist, A homotopy approach to rational covariance extension with degree constraint, International Journal of Applied Mathematics and Computer Science, vol. 11, no. 5, pp. 1173-1201, 2001.

C.I. Byrnes, P. Enqvist, and A. Lindquist, Cepstral coefficients, covariance lags and pole-zero models for finite data strings, IEEE Transactions on Signal Processing, April 2001.

C.I. Byrnes, P. Enqvist, and A. Lindquist, Identifiability and well-posedness of shaping-filter parameterizations: a global analysis approach, SIAM Journal on Control and Optimization, vol. 41, no. 1, pp. 23-59, 2002

P. Enqvist, A convex optimization approach to ARMA(n,m) model design from covariance and cepstrum data, SIAM Journal on Control and Optimization, vol. 43, no. 3, pp. 1011-1036, 2004.

L. Baratchart, P. Enqvist, A. Gombani and M. Olivi, Surface Acoustic Wave filters, unitary extensions and Schur analysis Institut Mittag-Leffler Report No. 44, 2002/2003 spring.

P. Enqvist, On the simultaneous realization problem: Markov parameter and covariance interpolation. Signal Processing, vol. 86, No. 10, pages 3043-3054, Oct. 2006.

L. Baratchart, P. Enqvist, A. Gombani and M. Olivi, Minimal symmetric Darlington synthesis Mathematics of Control, Signals, and Systems (MCSS), pages 283-311, Volume 19, Number 4 / November, 2007. ISSN 0932-4194 (Print) 1435-568X (Online).

Articles in Proceedings

P. Enqvist, A regularized cepstrum and covariance matching method for ARMA design. in Proceedings MTNS, 2002.

P. Enqvist, Pole-zero identification based on simultaneous realization of normalized covariances and Markov parameters, in Proceedings CDC, 2002.

C.I. Byrnes, P. Enqvist, and A. Lindquist, Identifiability and well-posedness of shaping-filter parameterizations: A global analysis approach, in Proceedings CDC, 2002.

P. Enqvist and A. Gombani, On the tangential q-Markov COVER problem in Proceedings CDC, 2003

P. Enqvist The covariance extension problem and Szegö polynomials École d’été à Porquerolles, Analyse Harmonique et Approximation Rationelle: leurs rôles en théorie du signal, du contrôle et des systèmes dynamiques, September 14-20, 2003.

L. Baratchart and P. Enqvist Symmetric lossless extensions and Schur analysis In Proceedings MTNS, 2004.

P. Enqvist, On Minimal MIMO Realization of Covariance and Markov Parameters. Proceedings MTNS, Kyoto, 2006.

L. Baratchart, P. Enqvist, A. Gombani, and M. Olivi. Minimal symmetric Darlington synthesis: a frequency domain approach 45th IEEE Conference on Decision and Control, 13-15 Dec. 2006, Page(s):6732 - 6737

P. Enqvist, Spectrum estimation by interpolation of Covariance and Cepstrum Parameters in an exponential class of spectral densities. Proceedings CDC, San Diego, USA, 2006.

P. Enqvist, Generalizing the Markov and covariance interpolation problem using input-to-state filters Proceedings European Control Conference (ECC), Kos, Greece, 2006.

P. Enqvist and E. Avventi, Approximative covariance interpolation with a quadratic penalty Proceedings CDC, New Orleans, 2007.

P. Enqvist and J. Karlsson, Minimal Itakura-Saito distance and covariance interpolation In Proceedings of the 18:th Mathematical Theory of Networks and Systems (MTNS), Virginia, USA, 2008.

P. Enqvist and J. Karlsson, Minimal Itakura-Saito distance and covariance interpolation 47th IEEE Conference on Decision and Control (CDC), Dec. 9-11, Cancun, Mexico, 2008.

P. Enqvist Covariance Interpolation and Geometry of Power Spectral Densities Proceedings European Control Conference (ECC), Budapest, Hungary, 2009.

Chapters in books

C.F. Martin, P. Enqvist, J. Tomlinson and Z. Zhang, Computation and Control IV, Linear control theory, splines and interpolation, pages 269 -287, Birkhauser, Boston-Basel-Berlin, 1995

Patent

C.I. Byrnes, A. Lindquist, P. Enqvist, and S. Gusev, Method and Apparatus for Speech Analysis and Synthesis, United States Patent 5,940,791, August 17, 1999.

Last update : May 14, 2008 by Per Enqvist